Electric controlling apparatus.



W. SGHWAGERMANN; ELECTRIC CONTROLLING APPARATUS.

APPLICATION FILED JULY 31,1907.

Patentefl Dec. 14, 1909.

5 mac mfo'c Show c4 4 6W 14+ M all concermi I e it know-n-that I,VVILLIAM-SOHWAGER- ing at, Yonkers, in the county of W'estchester I Sand Statev of New York, have invented-certa-in newandaweful Improvementsin Electric- Controlling A paratus, of which the full, ear,1and exactspecificainyention relates to electric controlling;' app aratus..Which'is particularly of advantagefjinithe operation of electric motors,althouglymyinventidnmay be applied to I t the oontrol ofothertranslating devices.

ggIn generalithegobject of my invention is 1311,81- p'rovisionotcontrolling means which will e be "efficient and reliable in operation,sect-n: jprotection. .of the motor ,from the occnrrence of abnormalconditions, and to so 2;! inte relate the parts that'the possibility ofL any'improper manipulation on the part of e operator is avoided. i

'llust-rated a starting device for-electric mo- 01 1s; avh chds adaptedto reverse the motor and secure full speed in either dlrection.

i The parts are so inter-related that starting 3 of the tmotor inionedirection isimpossible mless the controlling means for starting in lieopposite direction has been moved to operposition, Similarly, I uponreversal V he: motor ,the starting means cannot be H pe'i ated i ntilmeans for starting the motor lre opposi te: direction has been returnedt an po ti n-a 3 Although my inyen tio n' is shown appliedtart-ing-ideviicesfor electric motors, it will -be understood that thesame is likewise ap- 4Q pligable toregulating means or to any form"ficon Qllinfgswitches. v

i '0' slfeatures of my invention. will ood ,ifroni the followingdescription and accompanyingdrawings, in which filigui e lf isiajdiagram showing one form ,ot icoritr ling? apparatus and connectionseinbod yin ,my invention;vand'Fig. 2 is a niil ar, dia 'mslioWingcertainof the parts inposition for operation of the motor in one i emma i v v aRfferringfto the drawings, a source. of

N- n, a citizenof the United States, resid-v w ln the particular formof'my invention s owirmmheaccompanying drawings, Ihave UNITED STAT P orYoivxnns, NEWZinK; assmn naoi wiianmoan 1 a r nLncirnrc'cok,acoRPoRa'rIoN or "Yonn; l nrincrnic CONTRQIIIILINGZ-APPARATUS. I I i I ISpecification of Letters Patent" Patented Dec, 14 application filed July31,1907, seria1no.3se,3s1. T

and the series field winding is included in the main circuit of themotor armature as shown I have provided two independently movableelements ,7, 8 for controlling the motor, each of these elements beingrespectively connected to a terminal of the motor armature 4. Theseelementsare adapted to make contact respectively with the contacts 9,10, both of which are electrically connected to the same supply main 3.The element 8 is adapted to bemoved to the right and engage the contacts11 of the motor starting resistance 11, and as the element 8 is movedgradually to its final position,- the resistance will be graduallycutout of the motor circuit and so bring the motorto full speed. Inthefinal position the arm'8 will beretained by the no-voltage magnet 12against the action of spring 13 which tends to return the arm to engagethe contact, 10. The arm 7 is adapted .to engage a series of ance 11similar to the contacts 11. The

arm 7 is adapted to close the armature circuit by engagement of theinitial contact 14 and in the final position all oft-he armatureresistanceis cut out of circuit and the motor attains full speed. Thearm. 7 is retainedin final position by the novoltage 11121 11813015against the action of spring 16 which tends to return the arm 7 toengagement with contact 9.. Novoltage magnets 12 and 15 are shownconnected across the line in series with a high resistance 17. The finalresistance contacts 18, 19 are connected together electrically and tothe supply main 2, the contacts 9, 10 as above stated being connected tothe supply main 3. F or proper operation of the motor, it is essentialthat one of the arms 7, 8. engage'contacts 9 or 10 when the other arm ismoved to cut out resistance, and the construction should beysuch thatneither arm can be moved to start-themotor or cut outresistance from thearmature circuit Without the other arm being placed in engagement withone of the contacts 9, 10. -I secure this result by the controlling arm20 Whichis located between the arms 7, S and adapted to impart movementto eitherof these arms. Arm 20 is provided with an operating handle 21and extensions 22, 23. On the contact arm 7' is a projecting pin 24:,and when the arm 20 is moved to the left this pin will be engaged by theside of arm 20 and the contact arm will be moved radually over theresistance contacts and to final running position on contact 19. The arm7 will then be retained in position by no-voltage magnet 15. In thisfinal running position, the extension 22 will engage the pin 24 as shownin Fig. 2, and these arms will therefore be interlocked. Similarly whenthe operating arm is moved to the right it will engage the pin 25 on thearm 8 and in the final position the extension 23 will embrace pin 25 andcause the interlocking of these two arms. Fixed to the base plate orpanel and between the arms 7, 8 is a stud 26 which carries a slidablepiece comprising twobufters 27, 27 /connected by the neck 28. Theseparts which serve as a distance piece for the arms ,.8 as well asserving as a buffer for the arms 7 8, is of such length that it willprevent arms 7, 8 from engaging contacts 9, 10 respectively at the same.time, but it one of the arms is moved.

away from the buffer, the other arm will be forced by its spring intoengagement with oneor the other of contacts 9, 10, the bufler serving toprevent further movement of such arm as shown in Fig. 2.

In operation suppose the operating arm 20 to be moved to: the left fromthe position shown in Fig. 1. As soon as the element 7 is moved somewhatto the left by the operating arm, the spring 13 of element 8 will causethe latter to move against the slidable buffer and into engagement withcontact 10, as shown in Fig. 2. Further movement of the operating armwill cause the contact arm 7 which will engage the initial contact 14 toclosethe armature circuit causing the motor to start. The armaturecircuit will then be as follows a-From the main 3 i gradually be cut outof the armaturecircuit until in final position all the resistance willbe removed and the motor operated at full speed. In this final position,the operating and contact arms become interlocked and the novoltagemagnet 15 will retain the contact arm in final position as abovereferred to not move the operating arm to the off position or to startthe motor in the opposite direction without first moving the contact arm7 out of the influence of the novoltage magnet and so cause the spring16 to move the arm to oil position. If novoltage should occur when thecontact arm 7 is in final position, as shown in Fig. 2, or if the motorcircuit should be opened, or if the circuit of the novoltage magnetshould be opened as by push button switch 29, the arm 7 will be releasedand the spring 16 will throw this arm, together with arm 20, to the offposition. When the arm 7 is moved toward off position by its spring, itwill strike the buffer head 27 which in turn will drive contact arm 8from engagement with contact 10.

be desired to start and operate the motor in the opposite direction, thearm 20.will be moved to the right, and engage pin 25 on arm 8, and somove this contact arm toward the initial contact 11. If contactarm 7 hasnot already engaged contact arm 9 by force of spring 16, the moving ofarm 8 to the right away from the buffer head 27 will permit spring 16 tomove the arm 7 into engagement with contact 9. When the armature circuitis closed by arm 8 engaging the initial resistance 11, the motor willstart in the opposite direction and the circuit will be as follows :Fromline 3 through the field winding 6 to contact 9, element 7, through thearmature in the direction opposite to that previously considered tocontact 8. through the starting resistance to the final contact 18, andthen to the other supply main 2. Continued movement of the operat ingarm 20 and the contact arm 8 will gradually remove the armatureresistance from-the circuit and bringthe motor to full speed. In thefinal positlon, arm 8 will be retained by magnet 12 and automaticallyreleased upon occurrence of no voltage or interruption of circuits.

It will be seen by the construction and circuit connections abovedescribed that the operation of the motorin either direction isdependent upon one of the contact arms being in such position as toconnect one terminal of the armature to one side of the line and is alsodependentupon the other contact arm being moved to connect the otherterminal of the motor armature to the other side of the line.

It will further be apparent that the contact elements are Sointerrelated that improper operation of the contact elements isprevented.

Although I have shown my invention applied to starting devices for themotor, the same maybe-applied to regulating means. Also-any other devicethan a motor may be controlled, and the form or function'of the contactelements maybe other than that shown and described."

Various other modifications may embody my invention, and the lattermaybe used in conjunction with additional apparatus if desired.

Having thus described my invention,'1 declare that what I claim as newand desire to secure by Letters Patent, is,-

1. The combination of a supply circuit, a translating device, twoindependently movable switches, connections for connecting each of saidswitches to either of the supply mains, and means for insuring theconnection of-one of said switches to one supply main when the other ofsaid switches is con nected to the other of said supply mains.

2. The combination of a supply circuit, a translating device, twoindependently movable switches for connecting either supply 'maintoeither terminal of said device, and

means for insuring the connection of one terminal of said device to oneof said supply mains-by one of said switches when the other terminal ofsaid device is connected to the other of said supply mains by the otherof said switches.

3. The combination of a supply circuit of constant electron'iotiveforce, an electric motor having a field winding energized independentlyof its armature current, and two spring actuated starting resistancecontrolling elements, the said elements being in series with each otherand with the motor armature across said supply circuit, and means eitherof the supply mains, and a resistance cooperating with each of saidswitches for controlling the current through said translating device.

5. The combination of an electric motor, and a reversing rheostatcomprising two a1- mature controlling independently movable elementscontrolling the direction of rotation of the motor armature, and twonovoltage protective windings connected in a closed circuit containing afield winding of the motor.

6. The combination of an electric motor having an armature winding and afield winding,- and two independently movable armature controllingelements, each of said elements having a cooperating no-voltageprotective device.

controlling the movement of Sziid two ele said-tern'iinal to the Vthe'r;.o;tvsa-id tsupptyi a either of the supply mains. i r

8. The combination of a supply circuit,- a' translating device, acontrolling resistance, a switch element for connecting one terminal ofsaid device through said resistance to one of the supply mains and forco meeting said terminal. to the other of saic supply mains, and asecond switch element for conmeeting the other terminal of said deviceto either of the sup ly mains, and means for insuring proper relativeoperation of said switch elements.

9. The combination of an electric motor and a reversing rheostatcomprising two hand controlled starting levers, one of which levers whenmoved in one direction starts the motor in one direction. and the otherof which levers when moved in the opposite direction starts the motor inthe opposite direction. and a 110-voltage device cooperating with eachof said levers.

10. The combination of an electric motor, and two independently movablestarting contact elements having a common resistance for starting themotor, one of said elements being for starting the motor in onedirection and the other of said elements being for starting the motor inthe opposite direction, means for insuring proper operation of saidelements. and a 110-voltage protective device for each contact elementrespectively.

11. The combination of an electric motor, two independently movableresistance controlling elements for starting the motor, one in onedirection and the other in the opposite direction, and an operatinglever for ments. .iiid motor having a field winding energizedindependently of its armature current. i

12. The combination of an electric motor, two independently movableresistance elements for starting the motor, one in one direction and theother in the opposite direction, a single lever for controllingthemovement of both of said elements, and a novoltage protective devicecooperating with each of said elements respectively.

13. The combination of an electric motor, and controlling andreversingmechanism therefor comprising two independently movablearmature controlling elements, one of said elements adapted to controlthe rotation of the armature in one sense and the other adapted tocontrol the rotation in the other sense, two Ito-voltage devicescooperating with the movable elements respectively. and said motorhaving a field Windingf energized independently of said movableelements.

14. The combination of an electric motor, armature reversing mechanismcomprising two independently movable circuit controlling elements, andtwo no-voltage protective windings "having circuit connections per- 10manently connecting them to a field Wlnding of the motor. In testimonywhereof I afiix my signature, in presence of two' Witnesses. VILLIAMSCHlVAGERMANN. lVitnesses LEONARD KEBLER, lVAL'rm: H. Mo'r'r.

